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Three new turn-on fluorescent sensors for the selective detection of Zn2+: Synthesis, properties and DFT studies. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Kelani KM, Hegazy MA, Hassan AM, Tantawy MA. A green TLC densitometric method for the simultaneous detection and quantification of naphazoline HCl, pheniramine maleate along with three official impurities. BMC Chem 2022; 16:24. [PMID: 35379288 PMCID: PMC8981625 DOI: 10.1186/s13065-022-00819-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 03/25/2022] [Indexed: 11/10/2022] Open
Abstract
Impurity profiling of a pharmaceutical compound is now taking great attention during quality assessment of pharmaceuticals, as presence of small amount of impurities may affect safety and efficacy. In this work, a novel TLC chromatographic method coupled with densitometric detection was established for the simultaneous quantification of naphazoline HCl, pheniramine maleate and three of their official impurities, namely; naphazoline impurity B, pheniramine impurities; A & B. Chromatographic separation was carried out on TLC aluminum silica plates F254, as a stationary phase, using methanol: ethyl acetate: 33.0% ammonia (2.0: 8.0: 1.0, by volume), as a mobile phase. Plates were examined at 260.0 nm and International Council for Harmonisation (ICH) guidelines were followed for method's validation. Important factors, such as; composition of mobile phase and detection wavelengths were optimized. Linearity was achieved over the ranges of 2.0-50.0 µg band-1 for naphazoline, 10.0-110.0 µg band-1 for pheniramine, 0.1-10.0 µg band-1 for naphazoline impurity B and 2.0-50.0 µg band-1 for both pheniramine impurities. The proposed method was assessed in terms of accuracy, precision and robustness where satisfactory results (recovery % ≈ 100% and RSD < 2) were obtained. The method was also applied for the simultaneous determination of naphazoline HCl and pheniramine maleate, in Naphcon-A® eye drops, with respective recoveries of 101.36% and 100.94%. Method greenness was evaluated and compared to the reported HPLC one via environmental, health and safety tool. The developed method has much potential over the reported one of being simple, selective, economic and time saving for the analysis of the five cited compounds.
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Affiliation(s)
- Khadiga M Kelani
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, Cairo, 11562, Egypt
- Analytical Chemistry Department, Faculty of Pharmacy, Modern University for Technology and Information, El-hadaba El-Wosta, Mokatam, 5th district, Cairo, Egypt
| | - Maha A Hegazy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, Cairo, 11562, Egypt
| | - Amal M Hassan
- Analytical Chemistry Department, Faculty of Pharmacy, Modern University for Technology and Information, El-hadaba El-Wosta, Mokatam, 5th district, Cairo, Egypt
| | - Mahmoud A Tantawy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr el Aini Street, Cairo, 11562, Egypt.
- Chemistry Department, Faculty of Pharmacy, October 6 University, 6 October City, Giza, Egypt.
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Haššo M, Švorc Ľ. Batch injection analysis in tandem with electrochemical detection: the recent trends and an overview of the latest applications (2015–2020). MONATSHEFTE FUR CHEMIE 2022; 153:985-1000. [PMID: 35221380 PMCID: PMC8863510 DOI: 10.1007/s00706-022-02898-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 02/03/2022] [Indexed: 12/24/2022]
Abstract
The purpose of the proposed review is to refer the contemporary capability of automated analytical systems, in particular batch injection analysis (BIA) in connection with electrochemical detection, for widespread applications in analytical chemistry. This combination recently represents an efficient tool for improvement of method parameters, such as speed, selectivity, and sampling rate for sensing of miscellaneous organic and inorganic substances. The review is focused on conception and usage of BIA in tandem with electrochemical detection utilizing various techniques, namely amperometry, voltammetry, and multiple pulse amperometry, as well as design of electrochemical cells constructed for BIA systems is discussed. Finally, this paper also summarizes the comprehensive overview of works published from 2015 to 2020 dealing with the electrochemical determination of different analytes by BIA in various matrices.
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Affiliation(s)
- Marek Haššo
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, 812 37 Bratislava, Slovak Republic
| | - Ľubomír Švorc
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, 812 37 Bratislava, Slovak Republic
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4
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Simple and rapid voltammetric method for the detection of the synthetic adulterant fluoxetine in weight loss products. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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5
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Freitas JM, Silva PR, Munoz RA, Richter EM. Fast and portable voltammetric method for the determination of the amphetamine adulterant ephedrine in natural over-the-counter weight-loss products. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Dindar ÇK, Erkmen C, Uslu B, Göğer NG. The Development of Spectrophotometric and Validated Stability- Indicating RP-HPLC Methods for Simultaneous Determination of Ephedrine HCL, Naphazoline HCL, Antazoline HCL, and Chlorobutanol in Pharmaceutical Pomade Form. Comb Chem High Throughput Screen 2020; 23:1090-1099. [PMID: 32691707 DOI: 10.2174/1386207323666200720101835] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/27/2020] [Accepted: 05/06/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Allergic rhinitis, acute nasal congestion and sinusitis are one of the most common health problems and have a major effect on the quality of life. Several medications are used to improve the symptoms of such diseases in humans. Pharmaceutical pomade form containing Ephedrine (EPD) HCl, Naphazoline (NPZ) HCl, Antazoline (ANT) HCl, and Chlorobutanol (CLO) is one of them. OBJECTIVE For these reasons, this study includes the development of spectrophotometric and chromatographic methods for the determination of EPD HCl, NPZ HCl, ANT HCl, and CLO active agents in the pharmaceutical pomade. METHOD In the spectrophotometric method, third-order derivative of the amplitudes at 218 nm n=5 and the first-order derivative of the amplitudes 254 nm n=13 was selected for the determination of EPD, ANT, respectively while NPZ was determined by the second derivative at 234 nm and n=21. Colorimetric detection was applied for assay analysis of CLO at 540 nm. Furthermore, a reverse phase high performance liquid chromatographic (RP- HPLC) method has been developed and optimized by using Agilent Zorbax Eclipse XDB C18 (75 mm x 3.0 mm, 3.5μm) column. The column temperature was 40°C, binary gradient elution was used and the mobile phase consisted of 15 mM phosphate buffer in distilled water (pH 3.0) and methanol, and the flow rate was 0.6 mL min-1 and the UV detector was detected at 210 nm. The linear operating range was obtained as 11.97-70, 0.59-3, 2.79-30, and 2.92-200 μg mL-1 for EPD HCl, NPZ HCl, ANT HCl, and CLO respectively. RESULTS The LOD values were found to be 3.95, 0.19, 0.92 and 0.96 μg mL-1 for EPD HCl, NPZ HCl, ANT HCl, and CLO in the spectrophotometric method, respectively. The linear ranges in the RP-HPLC method were 8.2-24.36 μg mL-1, 0.083 - 0.75 μg/mL, 2.01-7.5 μg mL-1 and 2.89-24.4 μg mL-1 for EPD HCl, NPZ HCl, ANT HCl, and CLO, respectively. The LOD values in the validation studies were 2.7, 0.025, 0.66 and 0.86 μg mL-1 for EPD HCl, NPZ HCl, ANT HCl, and CLO in RP-HPLC method respectively. CONCLUSION The results of the spectrophotometric and chromatographic methods were compared and no differences were found between the two methods.
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Affiliation(s)
- Çiğdem K Dindar
- Department of Analytical Chemistry, Faculty of Pharmacy, Gazi University, Ankara 06330, Turkey
| | - Cem Erkmen
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara 06330, Turkey
| | - Bengi Uslu
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara 06330, Turkey
| | - Nilgün G Göğer
- Department of Analytical Chemistry, Faculty of Pharmacy, Gazi University, Ankara 06330, Turkey
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Lourencao BC, Brocenschi RF, Medeiros RA, Fatibello‐Filho O, Rocha‐Filho RC. Analytical Applications of Electrochemically Pretreated Boron‐Doped Diamond Electrodes. ChemElectroChem 2020. [DOI: 10.1002/celc.202000050] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bruna C. Lourencao
- Departamento de Química Universidade Federal de São Carlos (UFSCar) C.P. 676 13560-970 São Carlos – SP Brazil
| | - Ricardo F. Brocenschi
- Centro de Estudos do Mar Universidade Federal do Paraná (UFPR) C.P. 61 83255-976 Pontal do Paraná – PR Brazil
| | - Roberta A. Medeiros
- Departamento de Química Universidade Estadual de Londrina (UEL) C.P. 10.011 86057-970 Londrina – PR Brazil
| | - Orlando Fatibello‐Filho
- Departamento de Química Universidade Federal de São Carlos (UFSCar) C.P. 676 13560-970 São Carlos – SP Brazil
| | - Romeu C. Rocha‐Filho
- Departamento de Química Universidade Federal de São Carlos (UFSCar) C.P. 676 13560-970 São Carlos – SP Brazil
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Rocha RG, Silva WP, Sousa RMF, Junior MC, Santana MHP, Munoz RAA, Richter EM. Investigation of midazolam electro-oxidation on boron doped diamond electrode by voltammetric techniques and density functional theory calculations: Application in beverage samples. Talanta 2020; 207:120319. [PMID: 31594613 DOI: 10.1016/j.talanta.2019.120319] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 08/31/2019] [Accepted: 09/03/2019] [Indexed: 12/23/2022]
Abstract
Midazolam (MID) is a sedative drug which can be added in beverage samples as drug-facilitated-sexual assault (date rape drug). This type of drug has short half-life in biological fluids (not detectable) which often prevents the correlation between drug abuse and crime. In this work, we described a simple and low-cost method for fast screening and selective determination of MID in beverage samples (vodka, whiskey and red wine). For the first time, the electrochemical oxidation of MID was used for this purpose. The oxidation mechanism was studied using electrochemical techniques (cyclic and square-wave voltammetry) and computational simulations (density functional theory calculations). Differential-pulse voltammetry, boron-doped diamond electrode (BDDE), and Britton-Robinson (BR) buffer (pH = 2) were selected as electrochemical analysis technique, working electrode and supporting electrolyte, respectively. Different linear response ranges (4-25 μmol L-1 with r = 0.9972; 1-10 μmol L-1 with r = 0.9951; 1-15 μmol L-1 with r = 0.9982) and limits of detection (0.46, 0.43 and 0.33 μmol L-1) were obtained for the analysis of vodka, whisky, and red wine solutions, respectively. The precision and accuracy were satisfactory considering the low relative standard deviation values (RSD < 6.3%, n = 15) and minimal sample matrix effects (recovery values between 87 and 103%).
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Affiliation(s)
- Raquel G Rocha
- Federal University of Uberlandia, Institute of Chemistry, Uberlandia, Minas Gerais, 38400-092, Brazil
| | - Weberson P Silva
- Federal University of Uberlandia, Institute of Chemistry, Uberlandia, Minas Gerais, 38400-092, Brazil
| | - Raquel M F Sousa
- Federal University of Uberlandia, Institute of Chemistry, Uberlandia, Minas Gerais, 38400-092, Brazil
| | - Moacyr C Junior
- Federal University of Uberlandia, Institute of Chemistry, Uberlandia, Minas Gerais, 38400-092, Brazil
| | - Mario H P Santana
- Technical and Scientific Unit - Regional Superintendence of Brazilian Federal Police in Minas Gerais, 38408-680, Uberlandia, MG, Brazil
| | - Rodrigo A A Munoz
- Federal University of Uberlandia, Institute of Chemistry, Uberlandia, Minas Gerais, 38400-092, Brazil
| | - Eduardo M Richter
- Federal University of Uberlandia, Institute of Chemistry, Uberlandia, Minas Gerais, 38400-092, Brazil.
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Baluchová S, Daňhel A, Dejmková H, Ostatná V, Fojta M, Schwarzová-Pecková K. Recent progress in the applications of boron doped diamond electrodes in electroanalysis of organic compounds and biomolecules – A review. Anal Chim Acta 2019; 1077:30-66. [DOI: 10.1016/j.aca.2019.05.041] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 05/01/2019] [Accepted: 05/18/2019] [Indexed: 02/08/2023]
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11
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Voltammetric determination of copper and tert-butylhydroquinone in biodiesel: A rapid quality control protocol. Talanta 2019; 201:433-440. [DOI: 10.1016/j.talanta.2019.04.030] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/06/2019] [Accepted: 04/10/2019] [Indexed: 01/30/2023]
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12
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Svitková V, Labuda J, Vyskočil V. Batch Injection Analysis with Amperometric Detection for DNA Biosensing Applications. ELECTROANAL 2019. [DOI: 10.1002/elan.201900279] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Veronika Svitková
- Institute of Analytical Chemistry, Faculty of Chemical and Food TechnologySlovak University of Technology in Bratislava Radlinského 9 81237 Bratislava Slovakia
| | - Ján Labuda
- Institute of Analytical Chemistry, Faculty of Chemical and Food TechnologySlovak University of Technology in Bratislava Radlinského 9 81237 Bratislava Slovakia
| | - Vlastimil Vyskočil
- UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Faculty of ScienceCharles University Hlavova 8 12843 Prague 2 Czech Republic
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13
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Freitas JM, Oliveira TDC, Munoz RAA, Richter EM. Boron Doped Diamond Electrodes in Flow-Based Systems. Front Chem 2019; 7:190. [PMID: 31024886 PMCID: PMC6463006 DOI: 10.3389/fchem.2019.00190] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 03/12/2019] [Indexed: 01/14/2023] Open
Abstract
Boron-doped diamond (BDD) electrodes present several notable properties, such as the largest potential window of all electrode materials (especially in anodic potentials), low background and capacitive currents, reduced fouling compared to other electrodes, mechanical robustness, and good stability over time. On the other hand, flow-based systems are known as well-established approaches to minimize reagent consumption and waste generation and with good compromise between sample throughput and analytical performance (mechanization of chemical assays). This review focuses on the use of BDD electrodes for electrochemical detection in flow systems, such as flow injection analysis (FIA), batch injection analysis (BIA), high performance liquid chromatography (HPLC), and capillary electrophoresis (CE). The discussion deals with the historical evolution of BDD, types of electrochemical pre-treatments (cathodically/H-terminated or anodically/O-terminated), cell configurations, and analytical performance. Articles are discussed in chronological order and subdivided according to the type of flow system: FIA, BIA, HPLC, and CE.
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Sousa CP, Ribeiro FWP, Oliveira TMBF, Salazar‐Banda GR, de Lima‐Neto P, Morais S, Correia AN. Electroanalysis of Pharmaceuticals on Boron‐Doped Diamond Electrodes: A Review. ChemElectroChem 2019. [DOI: 10.1002/celc.201801742] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Camila P. Sousa
- Departamento de Química Analítica e Físico-Química Centro de CiênciasUniversidade Federal do Ceará Bloco 940, Campus do Pici Pici Fortaleza CE 60440-900 Brazil
| | - Francisco W. P. Ribeiro
- Instituto de Formação de EducadoresUniversidade Federal do Cariri Rua Olegário Emídio de Araújo Centro 63260-000 Brejo Santo, CE Brazil
| | - Thiago M. B. F. Oliveira
- Centro de Ciência e TecnologiaUniversidade Federal do Cariri Av. Tenente Raimundo Rocha, Cidade Universitária 63048-080 Juazeiro do Norte, CE Brazil
| | - Giancarlo R. Salazar‐Banda
- Instituto de Tecnologia e Pesquisa/ Programa de Pós-Graduação em Engenharia de ProcessosUniversidade Tiradentes 49032-490 Aracaju, SE Brazil
| | - Pedro de Lima‐Neto
- Departamento de Química Analítica e Físico-Química Centro de CiênciasUniversidade Federal do Ceará Bloco 940, Campus do Pici Pici Fortaleza CE 60440-900 Brazil
| | - Simone Morais
- REQUIMTE-LAQVInstituto Superior de Engenharia do Porto Instituto Politécnico do Porto R. Dr. António Bernardino de Almeida 431
| | - Adriana N. Correia
- Departamento de Química Analítica e Físico-Química Centro de CiênciasUniversidade Federal do Ceará Bloco 940, Campus do Pici Pici Fortaleza CE 60440-900 Brazil
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Çetinkol T, Öztürk F, ERDEN PINARESRA. Doping Agent Naphazoline Hydrochloride: Development of Simple and Fast Voltammetric Method for Its Determination in Human Serum. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2019. [DOI: 10.18596/jotcsa.450793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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16
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Ribeiro MMAC, Prado AA, Domingues Batista A, Alejandro Abarza Munoz R, Mathias Richter E. Rapid method for simultaneous determination of ascorbic acid and zinc in effervescent tablets by capillary zone electrophoresis with contactless conductivity detection. J Sep Sci 2019; 42:754-759. [DOI: 10.1002/jssc.201801042] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 11/26/2018] [Accepted: 11/26/2018] [Indexed: 01/21/2023]
Affiliation(s)
| | - Aliceana A. Prado
- Institute of Chemistry; Federal University of Uberlandia; Uberlandia MG Brazil
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da Costa Oliveira T, Santana MHP, Banks CE, Munoz RAA, Richter EM. Electrochemical Portable Method for On‐Site Screening of Scopolamine in Beverage and Urine Samples. ELECTROANAL 2018. [DOI: 10.1002/elan.201800707] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thiago da Costa Oliveira
- Institute of ChemistryFederal University of Uberlandia Av. João Naves de Ávila, 2121 – Bairro Santa Mônica 38400-902 Uberlandia, Minas Gerais Brazil
| | - Mário H. P. Santana
- Technical and Scientific Unit – Regional Superintendence of Federal Police in Minas Gerais 38408-680 Uberlandia, MG Brazil
| | - Craig E. Banks
- Faculty of Science and EngineeringManchester Metropolitan University Chester Street Manchester, M1 5GD UK
| | - Rodrigo Alejandro Abarza Munoz
- Institute of ChemistryFederal University of Uberlandia Av. João Naves de Ávila, 2121 – Bairro Santa Mônica 38400-902 Uberlandia, Minas Gerais Brazil
- National Institute of Bioanalytical Science and Technology, Campinas/SP 13083-861 Brazil
| | - Eduardo Mathias Richter
- Institute of ChemistryFederal University of Uberlandia Av. João Naves de Ávila, 2121 – Bairro Santa Mônica 38400-902 Uberlandia, Minas Gerais Brazil
- National Institute of Bioanalytical Science and Technology, Campinas/SP 13083-861 Brazil
- Faculty of Science and EngineeringManchester Metropolitan University Chester Street Manchester, M1 5GD UK
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Cardoso RM, Mendonça DMH, Silva WP, Silva MNT, Nossol E, da Silva RAB, Richter EM, Muñoz RAA. 3D printing for electroanalysis: From multiuse electrochemical cells to sensors. Anal Chim Acta 2018; 1033:49-57. [PMID: 30172331 DOI: 10.1016/j.aca.2018.06.021] [Citation(s) in RCA: 131] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 05/02/2018] [Accepted: 06/07/2018] [Indexed: 11/28/2022]
Abstract
This work presents potential applications of low-cost fused deposition modeling 3D-printers to fabricate multiuse 3D-printed electrochemical cells for flow or batch measurements as well as the 3D-printing of electrochemical sensing platforms. Electrochemical cells and sensors were printed with acrylonitrile butadiene styrene (ABS) and conductive graphene-doped polylactic acid (G-PLA) filaments, respectively. The overall printing operation time and estimated cost per cell were 6 h and $ 6.00, respectively, while the sensors were printed within minutes (16 sensor strips of 1 × 2 cm in 10 min at a cost of $ 1.00 each sensor). The cell performance is demonstrated for the amperometric detection of tert-butylhydroquinone, dipyrone, dopamine and diclofenac by flow-injection analysis (FIA) and batch-injection analysis (BIA) using different working electrodes, including the proposed 3D-printed sensor, which presented comparable electroanalytical performance with other carbon-based electrodes (LOD of 0.1 μmol L-1 for dopamine). Raman spectroscopy and scanning electron microscopy of the 3D-printed sensor indicated the presence of graphene nanoribbons within the polymeric matrix. Electrochemical impedance spectroscopy and heterogeneous electron transfer constants (k0) for the redox probe Ru(NH3)6+3 revealed that a glassy-carbon electrode presented faster electron transfer rates than the 3D-printed sensor; however, the latter presented lower LOD values for dopamine and catechol probably due to oxygenated functional groups at the G-PLA surface.
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Affiliation(s)
- Rafael M Cardoso
- Instituto de Química, Universidade Federal de Uberlândia, 38408-100, Uberlândia-MG, Brazil
| | | | - Weberson P Silva
- Instituto de Química, Universidade Federal de Uberlândia, 38408-100, Uberlândia-MG, Brazil
| | - Murilo N T Silva
- Instituto de Química, Universidade Federal de Uberlândia, 38408-100, Uberlândia-MG, Brazil
| | - Edson Nossol
- Instituto de Química, Universidade Federal de Uberlândia, 38408-100, Uberlândia-MG, Brazil
| | - Rodrigo A B da Silva
- Instituto de Química, Universidade Federal de Uberlândia, 38408-100, Uberlândia-MG, Brazil
| | - Eduardo M Richter
- Instituto de Química, Universidade Federal de Uberlândia, 38408-100, Uberlândia-MG, Brazil
| | - Rodrigo A A Muñoz
- Instituto de Química, Universidade Federal de Uberlândia, 38408-100, Uberlândia-MG, Brazil.
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Rocha DP, Cardoso RM, Tormin TF, de Araujo WR, Munoz RAA, Richter EM, Angnes L. Batch-injection Analysis Better than ever: New Materials for Improved Electrochemical Detection and On-site Applications. ELECTROANAL 2018. [DOI: 10.1002/elan.201800042] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Diego P. Rocha
- Instituto de Química; Universidade Federal de Uberlândia; 38400-902 Uberlândia, MG Brazil
| | - Rafael M. Cardoso
- Instituto de Química; Universidade Federal de Uberlândia; 38400-902 Uberlândia, MG Brazil
| | - Thiago F. Tormin
- Instituto de Química; Universidade Federal de Uberlândia; 38400-902 Uberlândia, MG Brazil
| | - William R. de Araujo
- Departamento de Química Fundamental; Instituto de Química; Universidade de São Paulo; Av. Professor Lineu Prestes 748 - 05508-000 São Paulo, SP Brazil
| | - Rodrigo A. A. Munoz
- Instituto de Química; Universidade Federal de Uberlândia; 38400-902 Uberlândia, MG Brazil
| | - Eduardo M. Richter
- Instituto de Química; Universidade Federal de Uberlândia; 38400-902 Uberlândia, MG Brazil
| | - Lúcio Angnes
- Departamento de Química Fundamental; Instituto de Química; Universidade de São Paulo; Av. Professor Lineu Prestes 748 - 05508-000 São Paulo, SP Brazil
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Oliveira TDC, Freitas JM, Muñoz RAA, Richter EM. Development of a Novel Versatile Method for Determination of two Antihistamines in Association with Naphazoline Using Cathodically Pretreated Boron-doped Diamond Electrode. ELECTROANAL 2018. [DOI: 10.1002/elan.201700658] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thiago da Costa Oliveira
- Institute of Chemistry; Federal University of Uberlândia; Av. João Naves de Ávila, 2121 Santa Mônica, Uberlândia, MG, CEP 38400-902 Brazil
| | - Jhonys Machado Freitas
- Institute of Chemistry; Federal University of Uberlândia; Av. João Naves de Ávila, 2121 Santa Mônica, Uberlândia, MG, CEP 38400-902 Brazil
| | - Rodrigo Alejandro Abarza Muñoz
- Institute of Chemistry; Federal University of Uberlândia; Av. João Naves de Ávila, 2121 Santa Mônica, Uberlândia, MG, CEP 38400-902 Brazil
| | - Eduardo Mathias Richter
- Institute of Chemistry; Federal University of Uberlândia; Av. João Naves de Ávila, 2121 Santa Mônica, Uberlândia, MG, CEP 38400-902 Brazil
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21
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Rocha DP, Cardoso RM, Mendonça DMH, Richter EM, da Silva SG, Batista AD, Muñoz RAA. Solenoid Micro-pumps: A New Tool for Sample Introduction in Batch Injection Analysis Systems with Electrochemical Detection. ELECTROANAL 2017. [DOI: 10.1002/elan.201700607] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Diego P. Rocha
- Federal University of Uberlândia; Institute of Chemistry; Uberlândia, MG Brazil CEP 38400-902
| | - Rafael M. Cardoso
- Federal University of Uberlândia; Institute of Chemistry; Uberlândia, MG Brazil CEP 38400-902
| | | | - Eduardo M. Richter
- Federal University of Uberlândia; Institute of Chemistry; Uberlândia, MG Brazil CEP 38400-902
| | - Sidnei G. da Silva
- Federal University of Uberlândia; Institute of Chemistry; Uberlândia, MG Brazil CEP 38400-902
| | - Alex D. Batista
- Federal University of Uberlândia; Institute of Chemistry; Uberlândia, MG Brazil CEP 38400-902
| | - Rodrigo A. A. Muñoz
- Federal University of Uberlândia; Institute of Chemistry; Uberlândia, MG Brazil CEP 38400-902
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22
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Silva WP, Silva LAJ, França CH, Sousa RMF, Muñoz RAA, Richter EM. Square-wave Voltammetric Determination of Propyphenazone, Paracetamol, and Caffeine: Comparative Study between Batch Injection Analysis and Conventional Electrochemical Systems. ELECTROANAL 2017. [DOI: 10.1002/elan.201700160] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Weberson P. Silva
- Instituto de Química; Universidade Federal de Uberlândia; Av. João Naves de Ávila 2121 Uberlândia, MG Brasil
| | - Luiz A. J. Silva
- Instituto de Química; Universidade Federal de Uberlândia; Av. João Naves de Ávila 2121 Uberlândia, MG Brasil
| | - Clarice H. França
- Instituto de Química; Universidade Federal de Uberlândia; Av. João Naves de Ávila 2121 Uberlândia, MG Brasil
| | - Raquel M. F. Sousa
- Instituto de Química; Universidade Federal de Uberlândia; Av. João Naves de Ávila 2121 Uberlândia, MG Brasil
| | - Rodrigo A. A. Muñoz
- Instituto de Química; Universidade Federal de Uberlândia; Av. João Naves de Ávila 2121 Uberlândia, MG Brasil
| | - Eduardo M. Richter
- Instituto de Química; Universidade Federal de Uberlândia; Av. João Naves de Ávila 2121 Uberlândia, MG Brasil
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23
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Ribeiro MM, Oliveira TC, Batista AD, Muñoz RA, Richter EM. A sub-minute electrophoretic method for simultaneous determination of naphazoline and zinc. J Chromatogr A 2016; 1472:134-137. [DOI: 10.1016/j.chroma.2016.10.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 10/07/2016] [Accepted: 10/11/2016] [Indexed: 12/01/2022]
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24
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Simultaneous determination of ascorbic and uric acids and dopamine in human serum samples using three-way calibration with data from square wave voltammetry. Microchem J 2016. [DOI: 10.1016/j.microc.2016.07.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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